Natural convection heat transfer of cold water within an eccentric horizontal cylindrical annulus

Ching-Jenq Ho, Y. H. Lin

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Natural convection heat transfer of cold water, encompassing a density inversion, within an eccentric horizontal annulus made of two isothermal cylinders, is numerically studied via a finite difference method. Numerical results have been obtained for an annular radius ratio 2.6 with Rayleigh number ranging from 103 to 106, the inversion parameter being 0.0 to 1.0, the eccentricity varying from 0 to 0.8, and the orientation angle of the inner cylinder between 0 and π. Results indicate that the flow patterns and heat transfer characteristics are strongly influenced by the combined effect induced by the density inversion of water and the position of the inner cylinder of the annulus. For the cases considered in the present study, a minimum in heat transfer arises with the inversion parameter between 0.4 and 0.5 depending primarily on the position of the inner cylinder.

Original languageEnglish
Pages (from-to)894-900
Number of pages7
JournalJournal of Heat Transfer
Volume110
Issue number4
DOIs
Publication statusPublished - 1988 Jan 1

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cold water
annuli
eccentrics
Natural convection
free convection
heat transfer
inversions
Heat transfer
Water
Finite difference method
Flow patterns
Rayleigh number
eccentricity
flow distribution
radii
water

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "Natural convection heat transfer of cold water, encompassing a density inversion, within an eccentric horizontal annulus made of two isothermal cylinders, is numerically studied via a finite difference method. Numerical results have been obtained for an annular radius ratio 2.6 with Rayleigh number ranging from 103 to 106, the inversion parameter being 0.0 to 1.0, the eccentricity varying from 0 to 0.8, and the orientation angle of the inner cylinder between 0 and π. Results indicate that the flow patterns and heat transfer characteristics are strongly influenced by the combined effect induced by the density inversion of water and the position of the inner cylinder of the annulus. For the cases considered in the present study, a minimum in heat transfer arises with the inversion parameter between 0.4 and 0.5 depending primarily on the position of the inner cylinder.",
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Natural convection heat transfer of cold water within an eccentric horizontal cylindrical annulus. / Ho, Ching-Jenq; Lin, Y. H.

In: Journal of Heat Transfer, Vol. 110, No. 4, 01.01.1988, p. 894-900.

Research output: Contribution to journalArticle

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